The word "professional" refers to a person who is skilled in a particular field or occupation and performs their job based on specialized knowledge, training, or expertise. It can also describe behavior or conduct that is characterized by competence, integrity, and ethical standards, often associated with various occupations, such as doctors, lawyers, and engineers.
The word "professional" comes from the Latin word "professio," which means "a public declaration." It evolved through Middle English and Old French before becoming part of modern English, retaining the concept of a person declaring their expertise in a certain field.